Valve bag



Dec. 27, 1938.

A. DU BOlS VALVE BAG Filed March 12, 1936 mim Patented Dec. 27,- 1838APATENT OFFICE 2,141,737- vAIfvE BAG Alfred Du Bois, Paris', FranceAppiieaiion March 12, 1936, serial No. 68,399`

In France October 11, 1935 sciaims. (ci. 22g-62.5)

My invention relates to valve bags, more particularly to flat bottombags, and its main object is to adapt this kind of bag for lling bymeans of a spout to be inserted'obliquely downwards into the bag whichis maintained in substantially tion much smaller than valve section,which considerably diminishes bag filling speed. However the use of anoblique spout is necessary in the case of iilling a bag simply bygravity.

My inventionconsists inpart of an outer valve lip, composed of a memberapplied on the bottom l5 and su'iciently exible and elastic as to allowof its being forced back by action of an oblique lling spout and toreturn to its closing position after 4removing the spout.

20 One may utilize, for example, to this end a member of crepe paperfabric, flexible matter such as rubber, etc.

It has been already proposed to constitute, in

a manner similar to the aforesaid, the inner valve lip,.but it was thusendeavoured to ensure a better closing of the valve, while the aforesaidproblem is quite different and nowise solved by this former particularmeans.

It is also a common practice in the aforesaid bags to constitute theouter bag lip, at least partially, by a member applied on the bottom andgenerally comprising a piece of pasteboard or strong paper, bufthatpieceA possesses' a, certain stiiness of its own and .it is further so35 secured on the bottom as to act as if it were K a rigidly integralpart of the bottom so that it 1s unable to play independently of thebottom.

Other objects of the present invention will appear from the followingdescription of an em- 40 bodiment of my invention.

In the drawing:

Fig. 1 is a perspective view with pieces partly broken away, of the endof a flat bottom valve bag improved according to my invention; f

Fig. 2 is a perspective view of the outwardly viewed end of the samebag:-

Fig. 3ds also a perspective View ofA said bag, but shows the oppositeend to that comprising the valve;

50 Fig. 4 is a cross section along the lvalve axis with filling spout inposition, and

Fig. 5 is a horizontal .view of the filling spout alone.

In the embodiment shown, the bag-bottom is 55 formed ,in the usualmanner by.:'the four over-` lapping panels I, 2, 3, '4A among vwhichpanels I, 2, 3 are secured together by clips 5, while panel 4 remainsfree and forms the inner valve lip. This panel 4 applies inwardly on apartof panels 2 and 3, which partly form the outer valve lip. 'Iheoverlapping part of the inner and outer valve lips thusr constitutedbeing too short to. ensure an adequate closing, there is applied be--neath panels 2, 3 and secured to said panels by clips 6 a subsidiarypanel.I But, whilst this panel 10 is usually formed bypasteboard andalso secured to panels 2, 3 along edges AB and AC, it is constitutedlierein, according to my invention by crepe paper and secured to panels2, 3'by the single cross row of clips 6, the edges AB andAC remainingfree.

In this way, the subsidiary panel v'l may be folded up, without injury,as shown byj Fig. 4, so as to give free passageito oblique filling spout8. After removing the spout, panel 1 returns automatically by its ownelasticity to its original closing position, as ,shown by Fig. 2 andthus -forms a part of outer valve lip.

In order to facilitate the forcing back of panel 1, the filling spout 8may be advantageously provided with a projecting .member 9 shaped sub.-stantially as a stem. f l

It is to be understood that instead of crepe paper, many other materialsmight be used, even a relatively stiff material which would be soincised on the extension of line AA as to open towards the right and theleft `like aps on thrust of spout 8 and particularly of stem 9, and soflexible as to fall back of itself after removing 35 spout 8.

Panel 1 might extend no farther than clips 6.

In the 'present vexample however its presence has ,obj ect of myinvention.

According to this improvement clips Slare rst placed ln corners E and Fat a certain distance from point A. It is easy to do so by passing thearm of the clip-fastener through A and the space above panel I0 andbeneath panels Il and l2. 'I'hen clips 5v are placed along sides A'G andA'H as well as between-A and A', the clipfastener arm then passingthrough A and the space left free beneath panels li -and I2 and 55 abovepanef I3, Vsince theclips at corners E andF do not extend to point A.'nie aperture left' in A forpasslng theclipastener arm is narrow and ofbottom KL which otherwise would come behind spoutandhinderitsremnval.Furthermoreby. preventing these deformations of the valve itenturesaregulal-playoftbememilerl'vllhnseop-Y eration might beimpairedby these deformations.

My invention is not intended of course to be 'limitedby the detailedconstruction shown and' described but only by the appended claims.

Whatlclaim is: -1. A fiat bottom, valve bag having a folir-V angledbottom made up of four overlapping panel-like folded end portions of theba'gwalls three of which are secured together and one situated beneaththe other remains free and forms .the

Vinnervalvelip,thetransverseedgesoi'riieside Pnels over said inner valvelip being obliquely Y directed with respect-to the bag walls and.therebv leavingY uncovered asubstantially triangular portion of that lip,a.sheetlke member oi ilexible andsonle'what resilient provided'pndersaig. side panelsand over said inner lip Y tocover atleastpartially portion, said member being securedpartiallyonlyto saidside panelsand" not Vto the inner valve lip to thereby h ave its outerend part forming ove its:

40 wholewidthafreeiiapcoveringatleastpartly -the -2. A'at bottom valvebag having a fourangled bottom made up o f four overlapping panel-likefolded end portions ot thebag walls thr of which are secured togetherandthe fourth partly overlapped'by the two adjaeent ones or side remainsfree from them, a sheet-like free iiap made oi iiexible and somewhatresilient material and having a'width substantially eflul' .Ote thatenne bottom, located beneatlgl' enla eldeleast a portion of that part ofthe fourth panel which is not overlapped by the side panels, said freeiiap having within the valve anv extension towards the interior oi thebag'V and by means of 10 which itis secured to the bottom so as to leavebetween said nap and said iourth'panel'a pes'- sagewaythrough whichanlling tube canbeslid .into the bag, that part of the free flap whichcovers the portion oi' the fourth panel not over-J 15 lapped by the sidepanels being una .adapted te be resiliently crimped back by a illingtube in-` serted obliquely through the valve opening.

3. A nat bottom valve bag as' in claim 2,

wherein said iree ilapis made of supple paper. 20

4. A iiat bottom valve bag as in claim'2, where' in sala free nep lsmede er crepe paper.

5. A iiat bottom valve bag having a'. fourangled bottom made up of fouroverlapping paliel-like folded end portions oi? the bag walls three. 25

of which are secured together andthe fourth situated beneath the-twoadjacent ones or side panels'remains free from the bottom and forms the`inner valve lip, the transverse edgesfof the side panels dening withsaid lip the valveopen- 30 ing and being -obliquely directed withvrespect to the bag walls,'thereby leaving uncovered between Vvthalliasubstantially triangular portion of that 1 lip, a sheet-like. member offlexible and somewhat resilient material and having a width subv35stantially equal' to that of the 'valve provided Aundeleeld slde panelsand ver sldlnner llpto cover-at least partially tle said triangularpor-v tion, said member being secured to' thebottom in Athe rear only ofa line perpendicular to the valve axis and passing through the meetingpoint oi said transverse edges' ofthe side panels'and neither to thatperl; or -the slee panels on each 'f side of said triangular part nor tothe inner valve 11D. thereby forming a free nap. l AIAT-RED DU BOIB.

